Eight instruments are ready for their "conductor." Place an instrument piece correctly in the sturdy wooden puzzle board and listen to it play. Then remove each piece to discover the identity of each of the instruments. Light-activated sensors trigger high-quality recordings that sound crisp and clear as they play through the built-in speaker. (TIP: Puzzle has light-activated sensors; for best results, expose the sensor by removing a piece in a brightly lit room, then make the sound play by replacing the piece in the board.) Puzzles measures 30 cm x 22 cm (about 12" x 9"). Requires 2 AAA batteries (not included).